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Ernst R, Fischer K, de Godoi Rezende Costa Molino C, Orav EJ, Theiler R, Meyer U, Fischler M, Gagesch M, Ambühl PM, Freystätter G, Egli A, Bischoff-Ferrari HA.Ernst R, et al.J Am Med Dir Assoc. 2020 Feb;21(2):254-259.e1. doi: 10.1016/j.jamda.2019.07.007. Epub 2019 Sep 6.J Am Med Dir Assoc. 2020.PMID: 31501003Free article.